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Improving DOI information using 3-layer crystals for small animal PETs

By: Kim, S.M.; Sim, K.S.; Lee, J.S.; Hong, S.J.; Rhee, J.T.; Choe, J.G.; Moon, D.H.; Lee, M.C.; Park, S.; Park, J.W.; Lee, K.S.; Hong, B.;

2004 / IEEE / 0-7803-8700-7


This item was taken from the IEEE Conference ' Improving DOI information using 3-layer crystals for small animal PETs ' Improving the spatial resolution without sacrificing the sensitivity is one of the most challenging goals for small animal PETs. The 3-layer configuration that we propose consists of 7 mm long LuYAP and 7 mm long LSO crystals aligned with each other, and 5 mm long LSO crystals with an offset of 1.15 mm. The LuYAP crystals are attached to Hamamatsu H7546B multi-anode PMTs, and the sensitive cells of which are aligned to match the 5 mm long LSO crystals. To estimate the improvement of the spatial resolution, we also simulated the 2-layer configuration of LSO and LuYAP, each with a 9.5 mm length. The Monte-Carlo simulation shows that the 3-layer configuration has a potential to improve the spatial resolution by about 30-40% at 40.0 mm from the central axis over the 2-layer configuration. To study the 3-layer configuration, we started to test the 2-layer and 3-layer configurations and presented preliminary test results.